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High Cursor:Pin S wait on X events after DB upgraded to 12.1.0.2.0 from 11.2.0.4

edited Jul 21, 2016 10:53AM in Database Tuning (MOSC) 13 commentsAnswered

Hi All,

     After we upgraded our database from 11g to 12c version, one of my client application is facing performance issues. The high wait events from AWR are "cursor: pin S wait on X" events. There is an Oracle SR for the same and we did below changes.

-> Changed the CURSOR_SHARING parameter to EXACT and set Optimizer_mode to 11g. Resolved the issue temporarily.

-> Applied the latest Apr - 2016 Bundle patch.

-> Changed the Optimizer mode value to 12c. Performance issue.

-> Changed the cursor_sharing to FORCE. Performance issue.

Any Idea how to resolve above event issue?

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